John Trapp on Proverbs 17:27

Verſ. 27. Hee that hath knowledge, ſpareth his words] Taciturnity is a ſign of ſolidity, and talkativeneſs of worthleſneſs. Epaminondas is worthily praiſed for this (ſaith Plutarch) that as no man knew more than hee, ſo none ſpake leſs than hee did.

And a man of underſtanding is of an excellent ſpirit] Or, of a cool ſpirit. The deepeſt Seas are the moſt calm, Where river ſmootheſt runs, deep is the ford, The Dial ſtirs, yet none perceives it move, &c.